Optimizing integrative cultivation management improves grain quality while increasing yield and nitrogen use efficiency in rice  

作　　者：ZHANG Hao HOU Dan-ping PENG Xian-long MA Bing-ju SHAO Shi-mei JING Wen-jiang GU Jun-fei LIU Li-jun WANG Zhi-qin LIU Yuan-ying YANG Jian-chang 

机构地区：[1]Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops,Yangzhou University,Yangzhou 225009,P.R.China [2]Resource and Environment College,Northeast Agricultural University,Harbin 150030,P.R.China

出　　处：《Journal of Integrative Agriculture》2019年第12期2716-2731,共16页农业科学学报（英文版）

基　　金：supported by the National Basic Research Program of China (2015CB150404);the National Key Research and Development Program of China (2016YFD0300206-4, 2017YFD0301206, 2018YFD0300801);the National Natural Science Foundation of China (31201155, 31871559);the Natural Science Foundation of the Jiangsu Higher Education Department, China (15KJA210005);the Young Elite Scientists Sponsorship Program by China Association for Science and Technology (2016QNRC001);the Six Talent Peaks Project of Jiangsu Province, China (SWYY-151);the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, China and the Top Talent Support Plan of Yangzhou University, China (2015-01)

摘　　要：A major challenge in rice(Oryza sativa L.)production is to cope with increasing grain yield and fertilizer use efficiency without compromising grain quality.This study was designed to determine if optimizing integrative cultivation management in rice could improve grain quality while increase yield and nitrogen use efficiency(NUE).An indica-japonica hybrid rice cultivar and a japonica rice cultivar were grown in the field,with five cultivation managements including no N application(0 N),local farmer's practice(LFP),and three optimizi ng in teg rati ve cultivati on managements,reducing N rate and increasi ng plant density(ND),ND+alternate wetting and moderate soil drying irrigation(NDW),and NDW+applying rapeseed cake fertilizer(NDWR).The results showed that the optimizi ng integrative cultivati on man ageme nts could not only in crease grain yield,but also enhance NUE compared to LFP.Compared to LFP,NDWR sign ifica ntly in creased brow n,milled,head milled rice rate,ratio of the kern el le ngth to breadth and breakdown value of starch,whereas decreased amylose content,gel consiste ncy,prolamin con tent,setback value,perce ntage of chalky kern els,and chalki ness.The three optimizing in tegrative cultivation managements increased con tents of total protei ns,albumin and glutelin,activities of the key enzymes involved in the sucrose-starch con version in grains,root oxidati on activity,and malic and succinic acid concentrations in root exudates during the grain-filling period.The results suggested that optimizing integrative cultivation managements could improve grain quality meanwhile increase grain yield and NUE by enhancing physiological activities of rice plants.A major challenge in rice(Oryza sativa L.) production is to cope with increasing grain yield and fertilizer use efficiency without compromising grain quality. This study was designed to determine if optimizing integrative cultivation management in rice could improve grain quality while increase yield and nitrogen use efficiency(NUE). An indica-japonica hybrid rice cultivar and a japonica rice cultivar were grown in the field, with five cultivation managements including no N application(0 N), local farmer’s practice(LFP), and three optimizing integrative cultivation managements, reducing N rate and increasing plant density(ND), ND+alternate wetting and moderate soil drying irrigation(NDW), and NDW+applying rapeseed cake fertilizer(NDWR). The results showed that the optimizing integrative cultivation managements could not only increase grain yield, but also enhance NUE compared to LFP. Compared to LFP, NDWR significantly increased brown, milled, head milled rice rate, ratio of the kernel length to breadth and breakdown value of starch, whereas decreased amylose content, gel consistency, prolamin content, setback value, percentage of chalky kernels, and chalkiness. The three optimizing integrative cultivation managements increased contents of total proteins, albumin and glutelin, activities of the key enzymes involved in the sucrose-starch conversion in grains, root oxidation activity, and malic and succinic acid concentrations in root exudates during the grain-filling period. The results suggested that optimizing integrative cultivation managements could improve grain quality meanwhile increase grain yield and NUE by enhancing physiological activities of rice plants.

关 键 词：RICE INTEGRATIVE CULTIVATION MANAGEMENT YIELD grain quality nitrogen use efficiency 

分 类 号：S51[农业科学—作物学]